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• This is a mod incompatibility. If I do this in vanilla Forge with only Et Futurum Requiem installed, it works normally.

Version number of Et-Futurum-Requiem (IMPORTANT)

Et Futurum Requiem 2.4.3

Describe the issue (IMPORTANT)

After installing the "Gilded Games Util" mod I get a lighting error when you break the blocks, (here is a video where you can see the problem I have) https://www.youtube.com/watch?v=Lg0WtTbU7eQ

In old versions of the mod (Et Futurum Requiem 2.3.1) this error did not happen.
Gilded Games Util is a mandatory complement to be able to use the "The Aether II" mod, here is the link of the mod that I want to use:

Gilded Games Util: https://www.curseforge.com/minecraft/mc-mods/gilded-games-util
The Aether II : https://www.curseforge.com/minecraft/mc-mods/aether-ii

Mod list (OPTIONAL)

UCHIJAAAAAAAAA mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UCHIJAAAAAAAAA FML{7.10.99.99} [Forge Mod Loader] (forge-1.7.10-10.13.4.1614-1.7.10.jar)
UCHIJAAAAAAAAA Forge{10.13.4.1614} [Minecraft Forge] (forge-1.7.10-10.13.4.1614-1.7.10.jar)
UCHIJAAAAAAAAA mod_ThreadedLighting{1.7.10-1.0} [Threaded Lighting] (minecraft.jar)
UCHIJAAAAAAAAA gilded-games-util{1.7.10-1.2} [Gilded Games Utility] (gilded-games-util-1.7.10-1.9.jar)
UCHIJAAAAAAAAA etfuturum{2.4.3} [§5§oEt Futurum Requiem] (Et_Futurum_Requiem-2.4.3.jar)

Additional Context (OPTIONAL)

Possibly it is the "Threaded Lighting" that is incorporated into the "Gilded Games Util" mod.
I suspect that because the name is related to the lighting error that I have.

Thank you very much for reading, have a nice day ^^

I finally got around to testing and I can't even say whether or not threaded lighting is entirely stable. After installing it, my world chunk loading gets exponentially slower as I load new chunks, and I also eventually experience the lighting glitches you describe. I can't really say what causes it.

Quick question, did you move away from the spawn area and test it there? This looks like you are in the small zone where you cant break blocks, and this is the resulting lighting issue. I can be way off with that guess though.

Are they using the version of Gilded Games Util which had threaded lighting stripped? That probably won't have this problem.

I am not sure if my mod is the source of this issue. Does the same issue happen without it?

Quick question, did you move away from the spawn area and test it there? This looks like you are in the small zone where you cant break blocks, and this is the resulting lighting issue. I can be way off with that guess though.

No, I tested it near the spawn point, this error only appears in the overworld, (at the end and in the Nether this does not happen)
Here is a video so you can see it better: https://www.youtube.com/watch?v=lMYkz0gSwxM

Are they using the version of Gilded Games Util which had threaded lighting stripped? That probably won't have this problem.

I am using this version of Gilded Games Util
https://www.curseforge.com/minecraft/mc-mods/gilded-games-util
[Gilded Games Util 1.7.10-1.3.2]

I have found the solution, it turns out that there is another version of "Gilded Games Util" where they fix this error by removing the "Threaded Lighting" that was inside that mod.
https://www.curseforge.com/minecraft/mc-mods/gilded-game-utils-fix
On the official page "The Aether ll" does not mention that and redirects you to the old "Gilded Games Util" version with this error.
I tried the fixed version and everything works fine.

Thank you all very much for helping me solve this problem ^^

EFR may be doing something it is not supposed to if it breaks this older version of that threaded lighting mod. I will leave this open and investigate for now.

Threaded lighting is not at all stable.

Should I close this then?

Yes. There are better alternatives if lighting is causing lag (shameless plug).